I'm new to D&D and I don't understand all of its concepts, for example, Astral Plane.
From what I understand, you can travel there physically through a portal and travel to other planes this way, but when you use certain spells, your consciousness is transferred to the Astral Plane and is connected to Your body with a silver cord. The body stays where it was and someone must take care of it and when the cord is broken, You die.
What does happen when in such form one enters a portal to another plane?